I found two bugs in WotR.
1. To win with Misty Mountains in Real Time mode, you have to kill all goblin workers, this include goblins from Lumber Mills.
2. When you have AI (Gondor in this case) in your team in Real Time mode, let's say AI doesn't play well. I mean it goes with a builders through the map, doesn't build anything and allows enemy AI to kill them and loose. I'm not sure if builders were going to selected spot on the map or were they going to the same spot as enemy was.